Machine for surfacing stone floors.



M. L. SCHLUBTER.

MACHINE POR SURPAGING STONE FLOORS.

APPLICATION FILED MAR.16, 1911.

Patented Aug. 15, 1911.

3 SHEETS-SHEET 1.

M. L. SGHLUETBR.

MAGHINB'FOR SURFAGING STONE FLOORS.

APPLICATION FILED 111131651911.

1 ,000,696, Patented Aug. 15, 1911.

Eg? l f 3 SHEETS-SHEET 2.

M. L. SGHLUETER.

MACHINE POR SUEFAGING STONE FLOORS. APPLICATION FILED 111111.16, 1911.

1 ,000,696, Patented Aug. 15, 1911.

3 SHEETS-SHEET 3.

To all whom 'it my concern:

Be it known that I, MAX L. SCHLUETER, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvenient` in Machines for Surfacing Stone Floors, of which the following is a specification.

This invention relatesl to machines' for surfacing stone cement or tile floors.

It employs revolving disks .imposed flatwise on the floor, and contains features of construction whereby the disks are adapted to be usedfon surfaces which are uneven.

ofzone of the guiding wheels.

The invention also contains features whereby it isv adapted at will to do a small amount or a large amount of surfacing on different portions of the floor according to the yrequirements of the work, so. that the entire floor may be given 'a uniform level surface. n Y

The nature of the invention is fully set forth below, vand will be' understood from the accompanying drawing and the subjoined description.

In the accompanying drawing Figure 1 is an elevation and Fig. 2 is a plan of the machine. Fig. 3 is a vertical section of one of the caster wheels. Fig. 4 is an elevation Fig; 5 is a sectionon the line 5 5 of Fig. 1. Fig'. 6 is a bottom'plan of one of the disks; Figs. .7 andl 8 .are vertical sections at right angles to each other of said disks.

In said drawing 10 and 11 are horizontal plates between which the electric or other motor 12 of the machine, together with other moving parts lof the machine are located.

The yplates are united by vertical bolts 13 so vthatfone .isimmovable as to the other, and they lare adapted to be raised or lowered unitedly by *the engagement of threaded sleeves 14 mounted on the stems or vertical shafts 15 upon which the caster wheels 16 sTATEsrAE NT OFFICE.

I.,v SCHLUETER, korjeijrrczacfo','11.1.1No1s. I MACHINE Fon sonFAoIiIe s'roNE FLOORS.

j meenam. 'y Patented Aug. 15, 1911. Application led March 16, 1911. Serial No. 614,765.

ratus is necessary, as for instance when the surfacing blocks become worn away, or when they are replaced by fresh` and thicker blocks, or when the tension of the springs on the disk shafts requires regulating or when' the machine is to be moved from place to place and the disks are raised above theirv operating planes.

The surfacingv disks are shown at 22. Ihey are arranged horizontally, and each 1s rotated by a vert-ical shaft 23, and a gear 24 at the upper end of the shaft. The shafts 23 are all keyed to the gears 24 but are plate 11 and said collar otherv springs 29 are f ones, but this fact is not important, as variations infthe pressure 0f the upper springs do not affect the operation of the machine materially. The upper springs support the mechanism when the disks are raised above their operating position and also when only a light pressure isdesired to be put upon the disks, and also it will be .noticed the springs described act as cushions to themachine so that if the disks rise or fall suddenly nosevere shock is likely to be causedv the machine thereby.

The disk shafts pass loosely through boxes or vbushings 30 in the plates 10 and .also in plate 11. The disks are also peculiar 1n their construction.I They each are attached to their shafts in such manner that theyA are at 'liberty to tip in any direction rendered neces-A sary by the unevenness of the surface upon which 'they are working, and to this end they wheels, the utility of the tubular frame will are attached to the shafts by a sort of uni,

, direction necessary to enable it to conform 'to the surface being polished, the opening for the shaft being enlarged as seen at 35. The polishing or surfacing blocks 36 are secured to the under surfaces of plates 22 by screws 37 or by clamping them between' raised ledges 38' by means of screws 39 as seen at Fig. 6. To insure the tipping o f lplates 22 in. conformity with the surface being operated upon," so that the polishing blocks may be kept in action without regard to the character of said surface, I provide above the plates 22 a second plate 40 which is rigidly attached'to the shaft and turns therewith, and-place between each plate 40 and thecorresponding 'plate 22 av series of vertical coiled springs 41 whose pressure is downward at all times and tends to force the lplate 22 down upon the floor, at the same time allowing it to yield and conform to any unevenness therein. The labor of rotating the plate 22, is desirably devolved upon the springs 41.

The caster wheels 16 are preferably ofthe' construction shown at Fig. 3 each having a spring 42 and a ring 43 surrounding the v spindle 44 and within 'the sleeve 14. This figure illustrates the sprocket to which the lever 20 is attached. The caster wheels are employed in such number as may be needed, and the machine illustrated contains five, but a greater-or less number may be used. I alsoprefer to extend the spindles or shafts 15 of some of the casters upward so they may be entered in the vertical posts 45 of the tubular top frame 45, 46. This frame is very convenient in moving the machine about, and as the disks can by the construction described be raised to inoperative vposition above the floor so that the entire machine will be, then supported by the caster be apparent.

The disks are made to revolve in opposite directions, each two opposingthe other two, so that the machine has no tendency to travel while operating, but in moving the machine about, it is often desirable to guide its movements automatically, and for this purpose I make the caster wheels 47, 47 at one side of the machine of larger diameter than the others, and actuate" them from the motor. To this end these wheels are secured rigidly to a cross shaft148 supporteddn bearings 49,

and such shaft is actuated by a chain 50 on .they are actuated. sprockets 51 and 5.2,"the latter being on a horizontal shaft 53 carrying a worm gear 54 meshing with the worm 55 on the vertical drive shaft 26. Each of the wheels 47 is connected to shaft 48 by a clutch 56 as shown at Fig. 4 and consequently either of them can be used separately, or they may be used together as desired. If used together they will propel the'machine either"forward or back in a straight path, but if only one is used the corner of the machine at which such wheel is located will be moved cornerwise in a circle, while the opposite diagonal corner of the machine remains substantially stationary. As this movement may be con'- tinued indefinitely, it will be seen that the floor surface located within the circle so described by the moving corner of the machine will be acted upon repeatedly by the disks. This enables the reduction of any spots in the floor which are higher or more'refractory than the balance. The wheels 47 are preferably provided with rubber tires so that they exert a traction power upon the machine. from the bearings 49 and are free to turn in the bearings and act in a manner similar to the stems 15 of the caster wheels 16, be-

ing provided with like threaded sleeves 14 'rigid upon them, and with sprocket wheels 18 meshing with chain 19. j v

A top plate 60 limits theupward movements of the disk shafts, and the switch 61 controls the motor12. While I have shown the machine as equipped with a Vgang of four grinding or polishing disks, it will be understood that the invention is independent of the number of disks, and that` any number either greater or smaller than four may be used.

1. The combination in a machine for surfacing stone floors or the like, of a plurality of surfacing disks, each united to an operating shaft by a universal joint allowing it to tip in conformity to the floor beingsurfaced,- said shafts each having yan adjustable v collar secured `centrally thereon, Ybetween which collar and' a lower bearing of the shaft, a spring is coiled around the shaft, rand a motor to which the shafts are geared and by which they areact-uated.

2. The combination 1n a machine for surfacing stone floors or the like, of a moving supporting carriage, a plurality of surfacing disks, eachunited to anoperating shaft by a universaljoint allowing it to tip in conformity tothe floor being surfaced, said shafts each having a collar secured centrally thereon, and also having springs coiled around it one'above and the other below the collar, and conned between the shaft bearings and said collar, and a motor to which the shafts are geared and by which 3. The combination'in a machine for surby which they are actuated, said shafts having freedom to move vertically 'in their driving gears, and their vertical movements in both directions being cushioned by springs.

v4'. vThe machine for surfacing stone floors or the like, having a plurality of surfacing disks each operated by a separatecvert-cal shaft, a -series of' swiveled -caster wheels [adapted to, support the machine from the floor, other wheels driven by power and acting to guide the movements of the machine, sprocket wheelsv on the stems of said wheels,

a vchain'extending around the machine and Aoperating said-wheels'in unison, and thread- 4e "devices on said stems whereby they may raise` the machine-.from the floor.

5.A The'macli-ne'for surfacing stone floors i orthe like, `having ajplurality of surfacing disks each o erated by a separate vertical shaft, a series of caster wheels, sprocket wheels on the stems of said wheels, a pair of non-swiveled caster wheels, sprocket wheels on'rods extending upward from said' last mentioned wheels, a chain engaging all said sprocket wheels, and A,threaded connections on said stems and said rods whereby the rotation caused by said chain raises the disks from the floor. n

6. The machine for surfacing stone floors or the llke, having a supporting Vcarriage, a

plurality of surfacing disks each operated byl a separate vertical shaft, a series of ,caster wheels 16, other cast-er wheels 47 driven by power and adapted to be driven independently7 of each other, and acting to guide and move the machine, and a motor and power connections from the motor to said guiding wheels, the machine being adapted vto beraised above its acting position on said cast-er wheels.

7. The machine for surfacing stone floors or the like, having a supporting carriage, a plurality of surfacing disks each operated by a separate vertical shaft, a series of caster wheels 16, other caster wheels 47 driven by power and each adapted to'be-driven independently and acting to guide and move the machine, and a motor and clutching power connections .from the motor to said guiding wheels, the machine being adapted to .be raised' above its acting position on said caster wheels.

8. The machine for surfacing stone oors and the like, having a series of supporting caster wheels, two'of which; upon one side of the machine are mounted on; a'lirizontal shaft, and connecteduto 'the motor of thel machine by separate clutches and are adaptedto propel the machine either 'singly or Witnesses:

PEARL ABRAMS, EDW. S. EvARTs. 

